Brake for window-sashes



' R. T. AXE AND'E. F. CHAFFEE.

BRAKE FOR WINDOW SASHES.

APPLICAT|0N FILED DEC.3I, 1917.

- Patented Aug. 10,1920.

2 SHEETS-SHEET I.

"apigll n l I17? kimmxe 2 SHEETS-SHEET 2.

Patented Aug. 10, 1920.

R. T. AXE.AND E. F. CHAFFEE.

BRAKE FOR WINDOW SASHES.

APPLICAHON FILED 050.31.1917.

UNITED STATES PATENT OFFICE.

ROY T. AXE AND EDWARD F. CHAFFEE, 0F SYRACUSE, NEW YORK, ASSIGNORS TO THE 0. M. EDWARDS COMPANY INC., OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

' BRAKE FOR WINDOW-SASHES.

Specification of Letters Patent.

Patented Au". 10, 1920.

Application filed December 31, 1917. Serial No. 209.712;

following is a specification.

This invention relates to windows, particularly railway car windows, and has for its object a particularlysimple and efiicient means for checking the movement of the sash or increasing a braking action as the movement of the sash increases above predetermined speed, which means is particularly applicable to prevent the dropping of the sash when the sash lock' or looks are released and to prevent injury to passengers and to the locks and the'sash.

The invention consists in the novel features and in the combinations and constructions hereinafter set'forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like 7 characters designate corresponding parts in all the views.

Figure 1 is a front elevation, partly broken away and partly in section, of awindow construction embodying our invention.

Fig. 2 is a side elevation, partly broken away, of the retarding means, the brake member being shown in its normal position; the contiguous portion of the sash and frame being also shown.

Fig. 3 is a view similar to Fig. 2, showing the action of the brake means when shifted by sudden movement or dropping of the sash. I

Fig. 4 is an end elevation of the brake and its box.

1 designates the window frame, and 2,

the sash movable in the guideways 3 formed in the frame. a

The brake or retarding means may be associated with one of two parts, one of which moves relatively to the other, and coacts with the other. of said parts, and includes a brake member shiftable by the movement of the movable part as the speed of said part increases above a predetermined speed, and means by which the friction of the brake member is increased and is released by the movement of said part in the opposite direction.

As here shown, the brake means is carried by the sash, and coacts with one of the walls of the guideway 3 of the frame. Preferably, there is a brake means at each side margin of the sash.

In the illustrated form of our invention, the brake means comprises a spring-pressed carrier 4 extending lengthwise of the portion of the window sash in the guideway 3 and located in the recess 5 formed in the margin of the sash and an engaging member orbrake shoe 6 movable in a guide extending lengthwiseof the carrier 4. Said guide extends in the direction of the path of movement of the sash at a slight inclined angle to-said path, and toward the point the carrier is acted on by its spring, so that the force of the spring is applied to the shoe with increasing pressure as the shoe approaches the spring. The carrier 4: is here shown as pivoted at one end as at 7 1n the recess 5, and asextending at a slight incline to the plane of the sash, and is movable outwardly on its pivot 7 to press the shoe 6 against a wall of the guideway, by a coiled spring 8 encircling the pivot and pressing at one end against a shoulder 9 of the carrier, and the carrier is also movable transversely of its pivot 7, it being formed with slots 10 through which the pivot extends.

The brake shoe 6 is mounted to have a tilting or rocking movement about an axis parallel to' the axis of the carrier 4, and has a stem portion 11 slidable in the guide 12 extending lengthwise of the carrier toward and from or substantially radial to the pivot thereof. The stem has a rounding lower end which rocks on the bottom of the guide 12 during the tilting of the shoe 6 about its axis.

Usually, the carrier 4 is bent up from sheet metal in the form of a channel U- shaped in cross-section, and the opposite sides thereof having their free edges bent inwardly toward the sides of the stem 11 of the shoe to overhang the lower end of the stem and thus form a guide to slidably hold the stem 11 of the shoe. In other words, the stem 11 is slidably dovetailed in the guide 12.

The carrier 4: is preferably located in a sheet metal box in the form of a channel in the sides of which the pivot 7 is mounted, this box being set into the recess 5 and having ears 13 forming extensions of one side thereof which side is flush with the edge face of the sash. Fastening members 14 extend through the ears 13 into the window Y sash.

locks 14, as the case may be, (some windows having one look and'others two), the sash drops suddenly and thus damages the bolts of the locks andoftentim'es drops on the it exerts butslight braking action.

arm or fingers of the passenger. our braklng means, when the sash is released and starts to drop, 1f the passenger lets go of the lock or locks so that the window can drop of its own weight, the brake shoe 1m mediately slides from its position shown 1n Fi 2 toward that shown in Fi 3 and inb n creases the braking actlon, (as the leverage of the spring .8 on the shoe 6 isconstantly changing, during the shifting ofthe shoe,)

.and stops the movement of the sash so that the passenger must exert some force to en .tirely close the window sash. However, if

the passenger does not let go of the catch or partly supports the'sash, the. shoe 6 remains in its position shown in Fig. 2, where The brake means alsoholds'the sash from rattling as it presses it against. a portion ofthe frame as the outer stop.

.lVhat we claim is: 1. The combination of a window frame, a

.sashmovable in the frame, a pivoted car- ;rier associated. with one of said parts, and a brake shoe supported by the carrier and ..slidablyieng aging the other of said parts,

the brake member being mounted'to rock- 'relatively to the carrier, substantially as and for the purpose described.

2. The combinatlon with a window frame,

a sash movable in the frame, a pivoted carrier associated with one of said parts, and formed with a guide extending toward its axis, and a brake'shoe supported by the car-- rier and slidably engaging the other of said parts, the brake member being mounted to rock relatively to the carrier, and to shift along the guide, substantially as and for the purpose specified.

8.- The combination of a window frame,

'asa'sh movable in the frame, a carrier pivote'dto one of said parts and extending lengthwise of thepath of movement of the sash' and movable in a direction transversely of its pivot, and a brake member supported "by the carrier and coacting with the other of said parts, substantially as and for the purpose described. j r

4. The combination ofa window frame,

a sash movable in the frame, a carrier pivote d to one of said parts, and movable in a direction transversely of its pivot, the carrier having a guide extending substantially radially relatively toits axis, a brake member coacting with the other of said parts, said brake member being shiftable along the guide, and spring means tending to move the carrier on its pivot to carry the brake member into operative position and also to resist transverse movement of the carrier relatively to its pivot, substantially as and for the purpose specified.

5. The combination of a window frame, a sash movable in the frame, a carrier pivoted to one of said parts and having a guide extending lengthwise of the path of movement of the sash toward the axis of the carrier and normally at an incline relatively to said path, the carrier being alsomovable in a direction transversely of its pivot, a brake member shiftable lengthwise of the guide, and spring means tending to move the carrieron its pivot to carry the brake member into operative position and-also resist transverse movement of the carrier relatively to a sash movable in the frame, a carrier pivoted to one of said parts and having a guide, extending lengthwise of the path of movement of the sash and toward the axis of the carrier, the carrier being also movable in a direction transversely of its pivot, a brake shoe rockably mounted in theguide on an axis extending parallel to the axis of the carrier and'also-shiftable'lengthwise of the guise toward and from the pivot of the car rier, the brake shoe coactingwith the other of said parts, and spring means tending to move -the carrier on its pivot and to resist transverse movement of the carrier relatively to its pivot, substantially as and for the purpose specified. r

7. A device of the character described comprising a-spring pressed'pivoted carrier movable in a direction transversely of the axis of its pivot, and formed with a, guide extending toward its pivot, the spring aeting to restrain pivotal and transverse movements of the carrier, and an engaging member movable along the guide, substantially as andfor the purpose specified.

8. The combination of a window frame, asa'sh movable in the frame, a pivoted carrier associated with one of said parts and a brake shoe supported by the carrier and slidably engaging the other of'said parts, the brake member being movable to slide along the carrier toward and from the axis thereof,-substantially as and for the purpose described.

In testimony whereof, we have hereunto signed our names, at Syracuse, in the county of Onondaga, and State of New York, this 8th day of November, 1917.

ROY T. AXE.

EDWARD F. CHAFFEE. 

